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Mark Salter9e5c33d2014-04-07 15:39:48 -07001#ifndef _ASM_EARLY_IOREMAP_H_
2#define _ASM_EARLY_IOREMAP_H_
3
4#include <linux/types.h>
5
6/*
7 * early_ioremap() and early_iounmap() are for temporary early boot-time
8 * mappings, before the real ioremap() is functional.
9 */
10extern void __iomem *early_ioremap(resource_size_t phys_addr,
11 unsigned long size);
12extern void *early_memremap(resource_size_t phys_addr,
13 unsigned long size);
14extern void early_iounmap(void __iomem *addr, unsigned long size);
15extern void early_memunmap(void *addr, unsigned long size);
16
17/*
18 * Weak function called by early_ioremap_reset(). It does nothing, but
19 * architectures may provide their own version to do any needed cleanups.
20 */
21extern void early_ioremap_shutdown(void);
22
23#if defined(CONFIG_GENERIC_EARLY_IOREMAP) && defined(CONFIG_MMU)
24/* Arch-specific initialization */
25extern void early_ioremap_init(void);
26
27/* Generic initialization called by architecture code */
28extern void early_ioremap_setup(void);
29
30/*
31 * Called as last step in paging_init() so library can act
32 * accordingly for subsequent map/unmap requests.
33 */
34extern void early_ioremap_reset(void);
35
36#else
37static inline void early_ioremap_init(void) { }
38static inline void early_ioremap_setup(void) { }
39static inline void early_ioremap_reset(void) { }
40#endif
41
42#endif /* _ASM_EARLY_IOREMAP_H_ */